Bridge abutment back combination backfill construction method

The invention discloses a bridge abutment back combination backfill construction method. The method comprises the following steps that a region formed by the abutment back and a retaining wall is backfilled with healthy soil, and the backfill soil in the U-shaped region formed by the abutment back and the retaining wall is excavated out and removed to form an inverted triangular stepped empty region; the inverted triangular stepped empty region is backfilled with light foamed soil. According to the bridge abutment back combination backfill construction method, the abutment back backfill region construction quality is improved, the bearing capacity of the backfill region is enhanced, and the probability of occurrence of the bumping phenomenon is decreased. 本发明公开了种桥台台背组合回填施工方法，包括以下步骤：将台背与挡土墙围成的区域采用好土回填；将台背与挡土墙所形成的U形区域的回填土挖除并清理形成倒三角台阶状空白区域；在倒三角台阶状空白区域内采用轻质泡沫土进行回填。本发明提出的桥台台背组合回填施工方法，提高了台背回填区域施工质量，增强了回填区域承载力，减小了跳车情况的发生概率。